package cn.edu.scau.cmi.suwenpeng.chapter05;

public class Lader {
 double upperBottom,height;
 static double lowerBottom;
 void setUpperBottom(double a) {
	 upperBottom=a;
 }
 void setLowerBottom(double b) {
	 lowerBottom=b;
 }
 double getUpperBottom() {
	return upperBottom;
 }
 double getLowerBottom() {
	 return  lowerBottom;
 }
}
